I teach middle school world history.
My state subscribes to Discovery Education's video streaming service (so many videos, so little time...). You might check them out, but I don't know what kind of terms they have for individual subscribers. I do like that they have their users rate videos, so you can see which ones other teachers have found useful.
Also, Carus/Cobblestone publishes magazines (Appleseeds, Calliope, Cobblestone) with no ads, volume and issue numbers like grown-up scholarly journals, lots of photographs, and interesting articles on history. You can subscribe, buy back issues (I just sent in another $300 purchase order for my classroom),
http://www.cobblestonepub.com/books/world+history/or subscribe to their entire text archive at cobblestoneonline.net for about $30. I went ahead and bought a subscription for the entire school to use, which cost about $125.
My class ends with Pizarro meeting the Inca, so I'm not as familiar with resources about more recent history.
